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Old 12-20-2017, 04:11 PM
Bruduf Bruduf is offline
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Join Date: Nov 04, 2017
Location: Lyme ct
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Efi and the vacuum hoses

I have a very nice 1984 J10 it runs pretty well but it has a small skip at idle the air pump was removed along with some of the plumbing still has lots of vacuum lines and original carburetor I was wondering if a new holly EFI setup would eliminate all the vacuum lines and make it run a little better. I do not have to deal with emissions in my state. Also thinking maybe a eddlebrok manifold and carb to get rid of the mess any help would be great thanks
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Old 12-21-2017, 09:38 AM
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babywag babywag is offline
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You could do either, but I’m partial to FI.
Holley just released a 2bbl version of sniper, perfect for one of these IMHO.
Only a couple vacuum lines remain w/ FI conversions.
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Old 07-14-2019, 07:35 PM
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spduffee spduffee is offline
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Location: Washington (WA)
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Quote:
Originally Posted by babywag
You could do either, but I’m partial to FI.
Holley just released a 2bbl version of sniper, perfect for one of these IMHO.
Only a couple vacuum lines remain w/ FI conversions.
I am 'this close' to getting an FI Tech system. Just need a few more dollars saved. I was wondering the same as Bruduf; just how many vacuum lines are left over after the swap? Just imagining all those vacuum lines disappearing gets me excited....
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Old 07-14-2019, 08:07 PM
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acct21 acct21 is offline
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Depends on your year model. You'll certainly lose some; depending on how you want to set it up you can actually delete most. But you'll always have some.
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Old 07-16-2019, 11:40 AM
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rang-a-stang rang-a-stang is offline
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Location: Camarillo, CA
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Quote:
Originally Posted by acct21
Depends on your year model. You'll certainly lose some; depending on how you want to set it up you can actually delete most. But you'll always have some.
EXACTLY. If you have a QTrack, you need vacuum to switch to E-Drive. If you buy a FI system that does not control timing, you will need vacuum to the dizzy. Some Cruise controls used vacuum. The heater motors under the dash use vacuum. You will probably want to maintain your charcoal canister (if you have one) and that requires vacuum. I assume you will want to dump your EGR if you get an Edelbroke intake and that will remove one system.

In the grand scheme of things, FSJs use ALOT of vacuum. You can dump some, but you may have to keep some depending on year and options.
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Old 07-19-2019, 08:57 AM
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tgreese tgreese is offline
 
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Howell has an example for the vacuum diagram on their site. Look here https://howellefi.com/wp-content/upl...9-05update.pdf It is meant to be used with the CARB-approved form of their EFI kit. You will still need vacuum for the mechanical stuff, like heater controls and any shifters.
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